Question

Reduced Price per Kilogram and Original Price
A reduction of 25% in price of oil enables a person to buy 5 kgs more for Rs 800. What is the reduced price per kilogram and original price?

Answer 1

A reduction of 25% in price of oil enables a person to buy 5 kgs more for Rs 800. What is the reduced price per kilogram and original price?
Soln
Let, the required rate be Rs x/kg
No of kg which can be bought in this rate=800/x
New rate =x- 25% of x=3x/4
No of kg whach can by for this rate =800/3x/4=3200/3x
--------Now,
3200/3x -800/x=5
Or, 800=15x
Or, x=160/3=Rs 53.34 / kg